Israel-Iran updates: Iran launches more missiles at Israel, sirens sound in Tel Aviv and Jerusalem

Top House Republican leaders are voicing support for Israel’s strikes on Iran.

Speaker Mike Johnson posted an Israeli flag on X and said, "Israel IS right—and has a right—to defend itself!

Majority Leader Steve Scalise said he stands with Israel.

"Iran has refused to dismantle its nuclear program, which puts America at risk and poses an existential threat to Israel. Tonight Israel is taking action to defend itself, and we stand with Israel. Our prayers are with them and all American personnel in the region," Scalise said in a post on X.

Echoing Trump administration officials, House Armed Services Committee Chairman Mike Rogers said the U.S. was not involved in the strikes.

"The U.S. was not involved in the strikes, but our forces stand ready to defend themselves and our ally Israel," Rogers said in a statement.

-ABC News' Lauren Peller

The head of Iran's Islamic Revolutionary Guard Corps Gen. Hossein Salami was killed in Israeli strikes on Iran, Iranian state TV reports.

Also killed was Dr. Fereydoun Abbasi, former head of the Atomic Energy Organization, according to Iranian state TV.

Israel has not confirmed the deaths.

A senior security official said, "There is a growing likelihood that the Iranian General Staff, including the Iranian Chief of Staff, and senior nuclear scientists were eliminated in the opening blow."

During a televised address, Israel Defense Forces Chief Eyal Zamir said the military was calling up "tens of thousands of soldiers" and was "prepared across all borders." The official went on to say, "I warn that anyone who will try to challenge us, will pay a heavy price."

Following Israel's series of strikes on Iran, the U.S. Embassy in Israel has directed all American government employees and their family members to shelter in place until further notice.

"The U.S. Embassy reminds U.S. citizens of the continued need for caution and increased personal security awareness – including knowing the location of the nearest shelter in the event of a red alert as security incidents, including mortar, rocket, and missile fire, and unmanned aircraft system (UAS) intrusions, often take place without any warning," the embassy said in a statement, adding, "The security environment is complex and can change quickly."